
const http = require('http')

function sleepTime(time){
    const sleep = Date.now() + time *1000
    while (Date.now()<sleep) {
        return 
    }
}

sleepTime(4)
const server = http.createServer((req, res)=>{
    res.end('server starting.....')
})
server.listen(8080,()=>{
    console.log("服务启动了");
})